Battery explosion-proof structure and battery comprising battery explosion-proof structure

Abstract

The invention provides a battery explosion-proof structure and a battery comprising the battery explosion-proof structure. The battery explosion-proof structure comprises a battery shell cover, a gland nut, an explosion-proof needle and an explosion-proof membrane, wherein the battery shell cover is provided with a countersink; the countersink is provided with a step face; the explosion-proof membrane and the gland nut are sequentially arranged on the step face; the explosion-proof needle is fixedly connected with the center of the top face of the gland nut and points to the explosion-proof membrane; at least one vent hole is formed in the top face of the gland nut; the explosion-proof needle is provided with at least three needle points; the tips of the needle points are located in one plane and can define a certain area; and the plane is parallel to a plane of the explosion-proof membrane. The battery comprises a battery shell and the battery explosion-proof structure. The battery explosion-proof structure is simple in structure and convenient to mount; the production efficiency is improved and the assembling error generated in a mounting process is also reduced; and the accuracy of pressure-releasing starting pressure is improved and the explosion-proof safety reliability is enhanced.

Description

technical field [0001] The invention particularly relates to an explosion-proof structure of a battery and a battery comprising the same. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, high specific energy, and wide operating temperature range. In recent years, they have been widely used in electric tools. In order to meet the high power requirements of electric tools when driving, the battery volume is getting bigger and bigger. For this reason, when abnormal conditions such as short circuit, overcharge, and overdischarge occur during battery use, a large amount of gas will be generated inside the battery, resulting in a sharp increase in the internal pressure of the battery, causing deformation of the battery case and even the risk of explosion. [0003] Power batteries used today, especially plastic case power batteries, mostly use explosion-proof devices with spring structures. This type of explosion-proof valve has rela...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a battery explosion-proof structure and its battery

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